Comparison
Overview
Company snapshot and where each provider is based.
| Field | Sinch | SMS.to |
|---|---|---|
| What it is | Cloud communications platform for messaging, voice, and email APIs | Omnichannel business messaging platform and API from Cyprus-based Intergo Telecom for sending SMS, Viber, WhatsApp, RCS and Telegram messages worldwide. |
| Founded | 2008 | 2016 |
| Ownership | public | private |
| Employees | 3,000-5,000 | 51-200 |
| HQ city | Stockholm | Paphos |
| HQ country | Sweden (EU) | Cyprus (EU) |
What's the differenceSinch edges ahead on the overall messaging.dev Score (92 vs 49). Sinch is public and headquartered in Stockholm, Sweden (EU); SMS.to is private and based in Paphos, Cyprus (EU).
Channels
Which messaging channels each provider can send and receive on.
| Field | Sinch | SMS.to |
|---|---|---|
| SMS | Yes | Yes |
| MMS | Yes | No |
| RCS | Yes | Yes |
| Yes | Yes | |
| Viber | Yes | Yes |
| Facebook Messenger | Yes | No |
| Telegram | Yes | Yes |
| Apple Messages for Business | Yes | No |
| Voice | Yes | No |
| Yes | No |
What's the differenceThey share 5 channels. Sinch additionally offers MMS, Facebook Messenger, Apple Messages for Business, Voice, Email.
Developer Experience
How quickly a developer can sign up and send a first message.
| Field | Sinch | SMS.to |
|---|---|---|
| Self-service onboarding | Yes | Yes |
| Free developer credit | Yes | Free trial credits on sign-up |
| Docs quality | high | med |
| Documentation | Open ↗ | Open ↗ |
| SDKs | Java, Python, C#, Node.js, PHP | PHP |
| Sandbox / test env | Yes | No |
| API types | REST, SMTP, SMPP | REST, SMPP |
What's the differenceOn SDKs, Sinch adds Java, Python, C#, Node.js; Sinch offers Sandbox / test env, while SMS.to does not; on API types, Sinch adds SMTP.
Data & Compliance
Data residency options and enterprise compliance certifications.
| Field | Sinch | SMS.to |
|---|---|---|
| EU data residency | Yes | Yes |
| US data residency | Yes | Yes |
| Choose region | Yes | Yes |
| GDPR | Yes | Yes |
| ISO 27001 | Yes | Yes |
| SOC 2 | Yes | No |
| HIPAA | Yes | No |
What's the differenceSinch offers SOC 2, while SMS.to does not; Sinch offers HIPAA, while SMS.to does not.
Data Retention
How long message content and metadata are stored, and whether that is configurable.
| Field | Sinch | SMS.to |
|---|---|---|
| Retention policy | Sinch retains message and delivery records to provide the service and meet legal obligations; retention windows for message content are limited and, for some products, configurable via data-processing agreements. | Customer data is retained only while the account remains open; on an account deletion request all data is deleted within 30 days. Customers can choose to have data processed only within the EU, in which case it is not transferred outside the EU; per-message content retention periods are not publicly documented in detail. |
What's the differenceSinch: Sinch retains message and delivery records to provide the service and meet legal obligations; retention windows for message content are limited and, for some products, configurable via data-processing agreements. SMS.to: Customer data is retained only while the account remains open; on an account deletion request all data is deleted within 30 days. Customers can choose to have data processed only within the EU, in which case it is not transferred outside the EU; per-message content retention periods are not publicly documented in detail.
Pricing & Credits
Pricing model and the cost of a first message.
| Field | Sinch | SMS.to |
|---|---|---|
| Pricing model | Pay-as-you-go per message with volume and committed-use pricing | Prepaid pay-as-you-go credit with no contracts or commitments; per-SMS rates vary by destination and volume discounts are negotiated with sales. |
| SMS starting price | Approx. $0.0075 per US SMS segment (varies by volume; plus carrier fees) | From $0.023 per SMS (advertised base rate; per-country rates via downloadable price list) |
| Free developer credit | Yes | Free trial credits on sign-up |
What's the differenceSinch and SMS.to are closely matched on pricing & credits — no material differences in the tracked fields.
Reach & Reliability
Global coverage and delivery dependability.
| Field | Sinch | SMS.to |
|---|---|---|
| Countries covered | 150 | 0 |
| Direct operator connections | Yes | Yes |
| Published uptime SLA | 99.95% | No published SLA (public status page at status.sms.to) |
What's the differenceSinch leads on Countries covered (150 vs 0 for SMS.to).
Company & Trust
Independent reviews and company profile.
| Field | Sinch | SMS.to |
|---|---|---|
| G2 rating | 4.3 | 4.4 |
| G2 reviews | 150 | 4 |
| Ownership | public | private |
| Employees | 3,000-5,000 | 51-200 |
What's the differenceSMS.to leads on G2 rating (4.4 vs 4.3 for Sinch); Sinch leads on G2 reviews (150 vs 4 for SMS.to).
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